Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 201 insertions, 0 deletions

diff --git a/app/test-pmd/mempool_anon.c b/app/test-pmd/mempool_anon.c
new file mode 100644
index 00000000..47304329
--- /dev/null
+++ b/app/test-pmd/mempool_anon.c
@@ -0,0 +1,201 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "mempool_osdep.h"
+#include <rte_errno.h>
+
+#ifdef RTE_EXEC_ENV_LINUXAPP
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+
+#define	PAGEMAP_FNAME		"/proc/self/pagemap"
+
+/*
+ * the pfn (page frame number) are bits 0-54 (see pagemap.txt in linux
+ * Documentation).
+ */
+#define	PAGEMAP_PFN_BITS	54
+#define	PAGEMAP_PFN_MASK	RTE_LEN2MASK(PAGEMAP_PFN_BITS, phys_addr_t)
+
+
+static int
+get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz)
+{
+	int32_t fd, rc;
+	uint32_t i, nb;
+	off_t ofs;
+
+	ofs = (uintptr_t)va / pg_sz * sizeof(*pa);
+	nb = pg_num * sizeof(*pa);
+
+	if ((fd = open(PAGEMAP_FNAME, O_RDONLY)) < 0)
+		return ENOENT;
+
+	if ((rc = pread(fd, pa, nb, ofs)) < 0 || (rc -= nb) != 0) {
+
+		RTE_LOG(ERR, USER1, "failed read of %u bytes from \'%s\' "
+			"at offset %zu, error code: %d\n",
+			nb, PAGEMAP_FNAME, (size_t)ofs, errno);
+		rc = ENOENT;
+	}
+
+	close(fd);
+
+	for (i = 0; i != pg_num; i++)
+		pa[i] = (pa[i] & PAGEMAP_PFN_MASK) * pg_sz;
+
+	return rc;
+}
+
+struct rte_mempool *
+mempool_anon_create(const char *name, unsigned elt_num, unsigned elt_size,
+		   unsigned cache_size, unsigned private_data_size,
+		   rte_mempool_ctor_t *mp_init, void *mp_init_arg,
+		   rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
+		   int socket_id, unsigned flags)
+{
+	struct rte_mempool *mp;
+	phys_addr_t *pa;
+	char *va, *uv;
+	uint32_t n, pg_num, pg_shift, pg_sz, total_size;
+	size_t sz;
+	ssize_t usz;
+	int32_t rc;
+
+	rc = ENOMEM;
+	mp = NULL;
+
+	pg_sz = getpagesize();
+	if (rte_is_power_of_2(pg_sz) == 0) {
+		rte_errno = EINVAL;
+		return mp;
+	}
+
+	pg_shift = rte_bsf32(pg_sz);
+
+	total_size = rte_mempool_calc_obj_size(elt_size, flags, NULL);
+
+	/* calc max memory size and max number of pages needed. */
+	sz = rte_mempool_xmem_size(elt_num, total_size, pg_shift);
+	pg_num = sz >> pg_shift;
+
+	/* get chunk of virtually continuos memory.*/
+	if ((va = mmap(NULL, sz, PROT_READ | PROT_WRITE,
+			MAP_SHARED | MAP_ANONYMOUS | MAP_LOCKED,
+			-1, 0)) == MAP_FAILED) {
+		RTE_LOG(ERR, USER1, "%s(%s) failed mmap of %zu bytes, "
+			"error code: %d\n",
+			__func__, name, sz, errno);
+		rte_errno = rc;
+		return mp;
+	}
+
+	/* extract physical mappings of the allocated memory. */
+	if ((pa = calloc(pg_num, sizeof (*pa))) != NULL &&
+			(rc = get_phys_map(va, pa, pg_num, pg_sz)) == 0) {
+
+		/*
+		 * Check that allocated size is big enough to hold elt_num
+		 * objects and a calcualte how many bytes are actually required.
+		 */
+
+		if ((usz = rte_mempool_xmem_usage(va, elt_num, total_size, pa,
+				pg_num, pg_shift)) < 0) {
+
+			n = -usz;
+			rc = ENOENT;
+			RTE_LOG(ERR, USER1, "%s(%s) only %u objects from %u "
+				"requested can  be created over "
+				"mmaped region %p of %zu bytes\n",
+				__func__, name, n, elt_num, va, sz);
+		} else {
+
+			/* unmap unused pages if any */
+			if ((size_t)usz < sz) {
+
+				uv = va + usz;
+				usz = sz - usz;
+
+				RTE_LOG(INFO, USER1,
+					"%s(%s): unmap unused %zu of %zu "
+					"mmaped bytes @%p\n",
+					__func__, name, (size_t)usz, sz, uv);
+				munmap(uv, usz);
+				sz -= usz;
+				pg_num = sz >> pg_shift;
+			}
+
+			if ((mp = rte_mempool_xmem_create(name, elt_num,
+					elt_size, cache_size, private_data_size,
+					mp_init, mp_init_arg,
+					obj_init, obj_init_arg,
+					socket_id, flags, va, pa, pg_num,
+					pg_shift)) != NULL)
+
+				RTE_VERIFY(elt_num == mp->size);
+		}
+	}
+
+	if (mp == NULL) {
+		munmap(va, sz);
+		rte_errno = rc;
+	}
+
+	free(pa);
+	return mp;
+}
+
+#else /* RTE_EXEC_ENV_LINUXAPP */
+
+
+struct rte_mempool *
+mempool_anon_create(__rte_unused const char *name,
+	__rte_unused unsigned elt_num, __rte_unused unsigned elt_size,
+	__rte_unused unsigned cache_size,
+	__rte_unused unsigned private_data_size,
+	__rte_unused rte_mempool_ctor_t *mp_init,
+	__rte_unused void *mp_init_arg,
+	__rte_unused rte_mempool_obj_ctor_t *obj_init,
+	__rte_unused void *obj_init_arg,
+	__rte_unused int socket_id, __rte_unused unsigned flags)
+{
+	rte_errno = ENOTSUP;
+	return NULL;
+}
+
+#endif /* RTE_EXEC_ENV_LINUXAPP */